public:

unsigned int type; // choose type from #defines listed above

unsigned int displayList; // which object to draw (uses flare and rocket models)

rsVec xyz; // current position

rsVec lastxyz; // position from previous frame

rsVec vel; // velocity vector

rsVec rgb; // particle's color

float drag; // constant to represent air resistance

float t; // total time that particle lives

float tr; // time remaining

float bright; // intensity at which particle shines

float life; // life remaining (usually defined from 0.0 to 1.0)

float size; // scale factor by which to multiply the display list

// rocket variables

float thrust; // constant to represent power of rocket

float endthrust; // point in rockets life at which to stop thrusting

float spin, tilt; // radial and pitch velocities to make rockets wobble when they go up

rsVec tiltvec; // vector about which a rocket tilts

int makeSmoke; // whether or not this particle produces smoke

int smokeTimeIndex; // which smoke time to use

float smokeTrailLength; // length that smoke particles must cover from one frame to the next.

// smokeTrailLength is stored so that remaining length from previous frame can be covered

// and no gaps are left in the smoke trail

float sparkTrailLength; // same for sparks from streamers

int explosiontype; // Type of explosion that a rocket will become when life runs out

// sorting variable

float depth;

// Constructor initializes particles to be stars because that's what most of them are

particle(SkyrocketSaverSettings *inSettings);

~particle(){};

// A handy function for choosing an explosion's color

void randomColor(rsVec& color);

// Initialization functions for particle types other than stars

void initStar(SkyrocketSaverSettings *inSettings);

void initStreamer(SkyrocketSaverSettings *inSettings);

void initMeteor(SkyrocketSaverSettings *inSettings);

void initStarPopper(SkyrocketSaverSettings *inSettings);

void initStreamerPopper(SkyrocketSaverSettings *inSettings);

void initMeteorPopper(SkyrocketSaverSettings *inSettings);

void initLittlePopper(SkyrocketSaverSettings *inSettings);

void initBee(SkyrocketSaverSettings *inSettings);

void initRocket(SkyrocketSaverSettings *inSettings);

void initFountain(SkyrocketSaverSettings *inSettings);

void initSpinner(SkyrocketSaverSettings *inSettings);

void initSmoke(rsVec pos, rsVec speed, SkyrocketSaverSettings *inSettings);

void initSucker(SkyrocketSaverSettings *inSettings); // rare easter egg explosion which is immediately followed by...

void initShockwave(SkyrocketSaverSettings *inSettings); // a freakin' huge explosion

void initStretcher(SkyrocketSaverSettings *inSettings); // another rare explosion followed by...

void initBigmama(SkyrocketSaverSettings *inSettings); // this other massive bomb

void initExplosion(SkyrocketSaverSettings *inSettings);

// "pop" functions are used to spawn new particles during explosions

void popSphere(int numParts, float v0, rsVec color, SkyrocketSaverSettings *inSettings);

void popSplitSphere(int numParts, float v0, rsVec color1, SkyrocketSaverSettings *inSettings);

void popMultiColorSphere(int numParts, float v0, SkyrocketSaverSettings *inSettings);

void popRing(int numParts, float v0, rsVec color, SkyrocketSaverSettings *inSettings);

void popStreamers(int numParts, float v0, rsVec color, SkyrocketSaverSettings *inSettings);

void popMeteors(int numParts, float v0, rsVec color, SkyrocketSaverSettings *inSettings);

void popStarPoppers(int numParts, float v0, rsVec color, SkyrocketSaverSettings *inSettings);

void popStreamerPoppers(int numParts, float v0, rsVec color, SkyrocketSaverSettings *inSettings);

void popMeteorPoppers(int numParts, float v0, rsVec color, SkyrocketSaverSettings *inSettings);

void popLittlePoppers(int numParts, float v0, SkyrocketSaverSettings *inSettings);

void popBees(int numParts, float v0, rsVec color, SkyrocketSaverSettings *inSettings);

// Finds depth along camera's coordinate system's -z axis.

// Can be used for sorting and culling.

void findDepth(SkyrocketSaverSettings *inSettings);

// Update a particle according to frameTime

void update(SkyrocketSaverSettings *inSettings);

// Draw a particle

void draw(SkyrocketSaverSettings *inSettings);

// Return a pointer to this particle

particle* thisParticle(){return this;};

// operators used by stl list sorting

friend bool operator < (const particle &p1, const particle &p2){return(p2.depth < p1.depth);}

friend bool operator > (const particle &p1, const particle &p2){return(p2.depth > p1.depth);}

friend bool operator == (const particle &p1, const particle &p2){return(p1.depth == p2.depth);}

friend bool operator != (const particle &p1, const particle &p2){return(p1.depth != p2.depth);}